internet - "TCP reset" as a censorship tool

Andrew Lih explains for lay people the way how the key word filtering at the internet is working, a discovery of researchers at the University of Cambridge. The Great Firewall is using same rather simple techniques that 'reset' your internet connection when the filters discover a banned word.
Apart from the already existing techniques like slightly changing the banned words, this is a nice addition to the tools to circumvent the firewall and heavy users of the internet might want to look into this way to ignore the firewall.
It supports my assumption that the censorship tools in China might be rather clever use of fairly simple techniques, not as elaborated as one often might think.